Automobile shock-absorber



J.'\/. DAWSON. AUTOMOBILE SHOCK ABSORBER.

APPLICATION FILED IULY 23, 1919.

Patented July 27 1,920.

w l l l UNITEDl STATES PATENT: OFFICE. I

JAMES v. DAWSON, or osxALoosA, IOWA,4 AssIsNoR or ONE-HALF To JAMES I.. MITCHELL, orwIIAT CHEER, IOWA. Y

To all whom 'it may concern:v Y

Be it known that I, YJAMES V. DAwsoN, a

citizen of the United States, anda resident v of the city of Oskaloosa, county of Mahaska, and State of Iowa, have invented certain new and useful Improvements inAutomobile Shock-Absorbers, of which the following is a specification.

, specifically to the type shown in the applicants former Patent -1,251,348, issued December 25, 1917, on which patent' the present invention is an improvement.

The principal object of this invention is to provide a shock absorber which can readily be substituted for the ordinary steering knuckle employed onV such front axles. A further object is to provide a device of this sort which will not widen or separate the wheel tread nor make it necessary to shorten the axle to preserve the same wheel tread as before the device is applied. A further object is to provide a knuckle which will eliminate the excessive lateral strains produced in the .type o f knuckle illustrated in the patent above referred to and also to produce a construction in which all springs will be tightly incased and protected from dust and dirt. Y

lVith these and other objects in view which will appear as this specification proceeds, my invention will be better understood by reference to the accompanying drawings which illustrate a preferred form of the invention, it being understood that such modifications thereof may be made as legitimately come within the scope of the appended claims.

With reference to the drawings in which like numerals refer to like parts throughout,-

Figure 1 is a side elevation of the assembled device partly in section on line 1-1 of Fig. 3. Fig. 2 is a vertical section kon line 2 2 of Fig. 4. Fig. 3 is a plan view with the wheel removed. Fig. 4 is an enlarged horizontal section on line 4 4 of Fig. 2, and Fig. 5 is an enlarged sectional elevation on line 5-5 of Fig. 2.

In the drawings the numeral 6 indicates a portion of an automobile front axle with the Y AUTOMOBLE SHOCK-ABSORBER.

Specification lof Letters Patent.

Appnciipn md muy 23, 1919. serial No.Y 312,753.

Patented -Jui'y 2'?, 19120.

customary enlarged head terminating in a lower lug 7 and an upper lug 8 which jointly carry a stud 9 vertically movable therein. 10 indicatesanouter housing preferably of box-like structure, having' an upper bearing 11 and a lower bearing 12 I'ixedly attached to said stud 9 beyond the bearings 7 and 8.

' Housing 10.carries the wheel spindle 13 on Vwhich 1s mounted a wheel 14 having the customary hub and bearings 15. A clearance space 16 is provided between kbearings 11 and 8 and a similar spacef17 between bearings 7 andr12. Located between the'axle lugs. 8' and 7 a second housing 18 is provided, the side walls of which internally engage the side walls of housing 10, housing 18 having bearings 19 and 20 slidably engaging stud 9.

Within the housing 18 a plurality of helical compression springs 21 are mounted, the upper ends of which engage the upper wall of housing 18 while the lower ends engage lugs 23 integral with housing 10. Springs 21 may be reinforced by additional springs 22 of smaller diameter if so desired. Fixedly attached also to housing 10 is an additional lug 24 lixedly engaging stud 9, a spring 25 surrounding said Vstud being positioned between said lug 24 and the bearing 2O on housing 18. Housing 18 may be provided with bearing surfaces 26 slidablyengaginglugs 27 integral with housing 410.

A steering arm 28 is-attached to one side of sorbed by the compression springs 21 and100 22 while any rebound or upward travel of the axle 6 will be absorbed by the spring 25 acting against lug 24. It will also be seen that the wheel 14 is located in customary position with reference to stud 9, that the springs are entirely inclosed within the housings and that the side strains produced in the aforementioned patent, due to the projecting leg or spindle support, have been entirely eliminated under the present con-VY struction. y

Having thus y described 'iny invention, what I claiin as new`and desire to protect by these Letters Patent is:

l. In combination With nan automobile axle having aV yoke on the end thereof, a Y.

stud slidably mounted Within said yoke, a housing iixedly engaging' said stud,'aV spindle integrally attached to said housing, a second housing internally engaging saidY first-mentioned housing and slidably engag-V ing' said stud Within said axle yoke, helical springs Within ysaid second housing, lugs integral with said .outer housing Vengaging one end of said springs, an additional spring Y surrounding a portion of said stud and enf and vertically movable With said stud, a

Wheel bearingispindle attached to said hous- ,v ing,y a second housiiig. vwithin said-yoke, a plurality of-symmetrically positioned helical springs Within said second housing, lugs Lon'said irsthousing engaging said springs,

a'helical spring surrounding said stud and engagingy said second housing and a lug on soV said first housing, there being clearanceV spaces betweenVY the longitudinal extremities of said first housing and said second housing and said yoke, asteerin'g arin integral with' saidl first housing, and` retaining` lugs on said first housing slidably engaging said second housing to prevent'separation o" said firstl and second mentioned housings, substantially as described.

In testimony WhereofI hereunto aflix my Y signature in the presence ,of two Vsubscribing Witnesses, Y f Y Y K Y 'JAMES V. DAWSON. WVitnesses:

Y IV. T. MARTIN, f

FRANCES Munk, 

